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Add up a column of numbers at the Unix shell
..... | paste -sd+ - | bc
is the shortest one I've found (from the UNIX Command Line blog).
Edit: added the - argument for portability, thanks @Dogbert and @Owen.
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Can you get DB username, pw, database name in Rails?
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From within rails you can create a configuration object and obtain the necessary information from it:
config = Rails.configuration.database_configuration
host = config[Rails.env]["host"]
database = config[Rails.env]["database"]
username = config[Rails.env]["username"]
passw...
Good tool to visualise database schema? [closed]
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Thanks, I thought the command line interface was kind of a pain, of course once I got it working I noticed the link to the GUI off the front page, joachim-uhl.de/projekte/schemaspygui. It should also be noted that program inserts Google ads into the r...
write a shell script to ssh to a remote machine and execute commands
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There are multiple remote linux machines, and I need to write a shell script which will execute the same set of commands in each machine. (Including some sudo operations). How can this be done using shell scripting?
You can do this with ssh, for example:
#!/bin/ba...
How can I make an EXE file from a Python program? [duplicate]
...A .py to .exe converter using a simple graphical interface built using Eel and PyInstaller in Python.
py2exe is probably what you want, but it only works on Windows.
PyInstaller works on Windows and Linux.
Py2app works on the Mac.
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Remove Application Insight from application on Visual Studio 2013
...pplication insight to a project which creates a ApplicationInsights.config and not sure what other files were added to the project.
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deny directory listing with htaccess
I have a folder, for example : /public_html/Davood/
and too many sub folder in folder, for example : /public_html/Davood/Test1/ , /public_html/Davood/Test1/Test/ , /public_html/Davood/Test2/ , ...
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Installing SciPy and NumPy using pip
...ired libraries in a package I'm distributing. It requires both the SciPy and NumPy libraries.
While developing, I installed both using
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Convert PEM to PPK file format
...EM files to PPK files? (you may guess that Amazon EC2 gives me a PEM file, and I need to use the PPK format for SSH connectivity).
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Is It Possible to NSLog C Structs (Like CGRect or CGPoint)?
...t doesn't work is because %@ signifies an object. A CGPoint is a C struct (and so are CGRects and CGSizes).
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